MAX8893A Datasheet, PDF(46/50 Page) Maxim Integrated Products – μPMICs for Multimedia Application Processors in a 3.0mm x 2.5mm WLP

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FPMIC for Multimedia Application Processor

in 2.5mm x 3.0mm WLP

Table 16. SVER

This register contains the MAX8893A/MAX8893B/MAX8893C version number.

Reset Value

Type

Special Features

SVER

0x46

N/A

Read

BIT

B7 (MSB)

B0 (LSB)

NAME

SVER

DESCRIPTION

Reserved for future use

00 = MAX8893A

01 = MAX8893B

10 = MAX8893C

DEFAULT VALUE

2) The master sends the 7-bit slave address followed

by a read bit (0x7D).

3) The addressed slave asserts an acknowledge by

pulling SDA low.

4) The master sends an 8-bit register pointer of the

first register in the block.

5) The slave acknowledges the register pointer.

6) The master sends a REPEATED START condition.

7) The master sends the 7-bit slave address followed

by a read bit.

8) The slave asserts an acknowledge by pulling SDA low.

9) The slave sends the 8-bit data (contents of the register).

10) The master asserts an acknowledge by pulling SDA low.

11) Steps 9 and 10 are repeated for as many registers

in the block, with the register pointer automatically

incremented each time.

12) The master sends a STOP condition.

Applications Information

Step-Down Converter

Input Capacitor

The input capacitor, CIN1, reduces the current peaks

drawn from the battery or input power source and reduc-

es switching noise in the IC. The impedance of CIN1 at

the switching frequency should be kept very low. Ceramic

capacitors with X5R or X7R temperature characteristics

are highly recommended due to their small size, low ESR,

and small temperature coefficients. Due to the step-down

converterâs fast soft-start, the input capacitance can be

very low. For most applications, a 2.2FF capacitor is suf-

ficient. Connect CIN1 as close as possible to the IC to

minimize the impact of PCB trace inductance.

For other input capacitors, use a 2.2FF ceramic capaci-

tor from IN2 to ground and a 2.2FF ceramic capacitor

from BATT to ground.

Output Capacitor

The output capacitor, CBUCK, is required to keep the

output voltage ripple small and to ensure regulation loop

stability. CBUCK must have low impedance at the switch-

ing frequency. Ceramic capacitors with X5R or X7R

temperature characteristics are highly recommended

due to their small size, low ESR, and small temperature

coefficients. Due to the unique feedback network, the

output capacitance can be very low. For most applica-

tions a 2.2FF capacitor is sufficient. For optimum load-

transient performance and very low output ripple, the

output capacitor value in FF should be equal to or larger

than the inductor value in FH.

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